CVE-2026-34865 | BDVDB-2026-326686 Detail

HuaweiHarmonyOS

Description#

Out-of-bounds write vulnerability in the WEB module.Impact: Successful exploitation of this vulnerability will affect availability and confidentiality.

Impact#

Per CVSS v4.0: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-122 Heap-based Buffer Overflow

References#

https://consumer.huawei.com/en/support/bulletinwearables/2026/4/

Exploit#

No public exploit known

History#

Version 12026-04-13Record published in the CVE List.

Published

Published: 2026-04-13
Last modified: 2026-04-13

Vendor information

Vendor: Huawei
Product: HarmonyOS

All Huawei vulnerabilities

Score

10.0 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 11.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
6.0.0
Fixed
Not stated

Scoring System

CVSS v4.0

10.0 Critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Attack Requirements	None
Privileges Required	None
User Interaction	None
Vulnerable System Confidentiality	High
Vulnerable System Integrity	High
Vulnerable System Availability	High
Subsequent System Confidentiality	High
Subsequent System Integrity	High
Subsequent System Availability	High

CVSS v3.1

Not available

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).